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Author Topic: 4th axis ghost move  (Read 2866 times)

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Offline docltf

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4th axis ghost move
« on: November 11, 2008, 12:56:30 PM »
using mach3 ver 2.02 and ver 3.042.016  -- using no CV and no backlash!
below a code snippet. -- mach3 adds a move between the lines of code before execution.

g00 x-1.9375 y0 a0
g01 z-.100 f5
         (then Aaxis makes a move 0.050)
g01 x-.0625 y.125 a90 f7.0
g02 x-.0625 y-.125 r.125
          ( then A makes a move 90.2167)
g01 x-1.9375 y0 a180
          ( then A makes a move 180.050)
g01 x-.0625 y.125 a270
g02 x-.0625 y-.125 r.125
          ( then A makes a move 270.2167)
g01 x-1.9375 y0 a360

the Axis is suppose to move from 0 to 90 not 0 to 0.050 then to 90 .
it is adding a extra move before it executes a line of code that includes the 4th axis

bill
Re: 4th axis ghost move
« Reply #1 on: November 11, 2008, 01:18:10 PM »
Are you using backlash compensation?  That will add moves.

Regards,
Ray L.
Regards,
Ray L.

Offline docltf

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Re: 4th axis ghost move
« Reply #2 on: November 11, 2008, 04:04:18 PM »
using mach3 ver 2.02 and ver 3.042.016  -- using no CV and no backlash!

Offline RICH

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Re: 4th axis ghost move
« Reply #3 on: November 11, 2008, 05:50:02 PM »
Does it act the same with both versions? Can't tell you anything about 2.02 ( is this before 2.63 even?)
What code do you have before the first goo?
Also did you write the code or did it come from a wizard?
RICH
« Last Edit: November 11, 2008, 06:00:37 PM by RICH »

Offline docltf

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Re: 4th axis ghost move
« Reply #4 on: November 11, 2008, 06:26:10 PM »
Hi ,Rich

i got it under control but it is still not clean ,just a slight move. had to set shuttle speed to the bar bone and open and close mach a few times so it would catch.i never noticed it running
small dia parts . with a 18 inch dia part it is a big problem. well back to the grind,thanks.

bill